Best Time to Fly LAS to BWI: On-Time Stats by Hour & Airline
Harry Reid International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.9% of Las Vegas (LAS) to Baltimore (BWI) flights arrived on time (1,782 scheduled flights). That is 1.3 points above the national average of 77.6%.
Among 2 airlines, Spirit Airlines led with 80.5% on time and Southwest Airlines was last with 78.8%.
Over 24 months, Tuesday was the most reliable day (89% on time) and July the worst month (67%).
The cancellation rate was 0.8% (US average 1.8%).
LAS to BWI on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlines | 80.5% | 82 min | 0.0% | 149 |
| Southwest Airlines | 78.8% | 44 min | 0.9% | 1,633 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAS to BWI
On-time arrival % by scheduled departure hour (local time), 3,926 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 13 | |
| 5am–6am | 93.4% | 0.0% | 62 |
| 6am–7am | 94.2% | 0.5% | 570 |
| 7am–8am | 88.6% | 0.0% | 124 |
| 8am–9am | 85.9% | 0.0% | 224 |
| 9am–10am | 84.3% | 0.0% | 216 |
| 10am–11am | 78.2% | 1.7% | 173 |
| 11am–12pm | 81.8% | 0.6% | 180 |
| 12pm–1pm | 72.0% | 1.6% | 256 |
| 1pm–2pm | 68.7% | 0.0% | 116 |
| 2pm–3pm | 61.8% | 1.3% | 228 |
| 3pm–4pm | 66.7% | 2.1% | 237 |
| 4pm–5pm | 66.0% | 0.5% | 199 |
| 5pm–6pm | 72.6% | 0.0% | 232 |
| 6pm–7pm | 66.9% | 1.2% | 172 |
| 8pm–9pm | 80.8% | 0.0% | 52 |
| 9pm–10pm | 85.7% | 0.0% | 301 |
| 10pm–11pm | 84.5% | 0.9% | 462 |
| 11pm–12am | 85.3% | 0.0% | 109 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LAS to BWI
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 98.5% | +16.6 pts | 0.0% | 66 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.2% | -3.8 pts | 0.7% | 143 |
| Summer peak (Jun 15 - Aug 15) | 68.2% | -13.7 pts | 1.2% | 664 |
| All other days | 81.9% | — | 0.6% | 3,053 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).